We accept product returns within 30-days after you have received your order. All returns are subject up to a 20% restocking fee after approval.
Ford-RFK-004-Raw
- Rear shackle flip kits position the shackle downward in order to allow the rear leaf springs to follow a more natural arc instead of fight the leaf spring under compression.
-Noticeable ride improvement.
Application:
-Truck: 78-97 Ford F-250/350, 92-18 E-350, 80-96 Bronco/F-150
-Spring: Kits fit the 3.5" overall width spring.
Includes:
-Includes rear hangers and hardware for rear bolting hangers to frame.
-Sold in a set to replace each side of the vehicle.
-Hangers use factory bolts to attach hanger-shackle.
Additional Information:These kits fit the 80-97 Ford F-250-350 platform, and can be modified to fit the Bronco / F-150 by re-drilling the frame mounting bolt holes.
We also offer Heavy Duty Stock Replacement Shackles and 1" Lift Shackles as well
-Remove Factory Rivets and hanger
-Install Rear Shackle Flip (there is a left and right, line holes in frame up with bracket so it runs close to parallel with the frame) secure using 1/2-1.5” bolts. It is very common to need to die grind 1 or 2 holes in the frame to line up with the bracket. Ford stamped and riveted everything so nothing is ever quite the same twice.
Pinion angle should be checked after installation, corrected if needed. Axle center line may have moved forward from stock. Giant lift springs will affect axle position more so and is very difficult to plan for without having parts assembled on the truck.

We accept product returns within 30-days after you have received your order. All returns are subject up to a 20% restocking fee after approval.
The steering linkage upgrade for my Dana 60 axle is top shelf. The rep at OBS was excellent to deal with, Replies to my questions were very quick and helpful. The package arrived in a timely manner and in excellent condition. I highly recommend OBS for your custom parts and obs parts.
Great product! Easy to install one step closer to getting my Lighting restored!!
Excellent product and solution for my OBS Bronco
Great product arrived quickly
These guys are some bad dudes…….. and they probably don’t even know it. Bought this get to give the old girl a modern twist. I absolutely love it. Once again the instructions were spot on and install was a breeze. These guys probably didn’t even realize they gave me the perfect mount for my oil catch can too. Probably get roasted for where I have it mounted but it works great. These guys are changing the game one OBS at a time.
The steering linkage upgrade for my Dana 60 axle is top shelf. The rep at OBS was excellent to deal with, Replies to my questions were very quick and helpful. The package arrived in a timely manner and in excellent condition. I highly recommend OBS for your custom parts and obs parts.
Great product! Easy to install one step closer to getting my Lighting restored!!
I’m not to the point of using them yet, but they were well built, the complete kit and I’m sure they will be exactly what I needed to do this 5.9 Cummins to F250 conversion. They were exactly what was described, came with a diagram to know how to accomplish the installation and will save a lot of time from having to build them. Thank you